As part of the core public health functions, disease data are collected and maintained by the Infectious Diseases Division of the Connecticut Department of Public Health (DPH). It is important to note that surveillance methods may change over time as needed to reflect how the data will be used. These changes can have an impact on the number of cases and incidence of disease over time. The Infectious Diseases Section monitors over 80 reportable diseases, emergency illnesses, and health conditions that are declared reportable by the Commissioner of the DPH. Surveillance is conducted for many infectious diseases including, for example, vector-borne, foodborne, healthcare associated, vaccine preventable, and sexually transmitted illnesses, as well as, HIV, viral hepatitis, and tuberculosis. Collected data are used by the DPH to identify trends, outbreaks, and changes in infectious agents. Aggregate data of reportable diseases over time, can be found below. All documents are in PDF. For other data needs, please contact the appropriate program listed below.

Information on foodborne outbreaks in Connecticut (1998-2014) is available through the Foodborne Outbreak Online Database (FOOD Tool), which is a database maintained by the Centers for Disease Control and Prevention (CDC) that allows you to search by year, state and pathogen to find different foodborne illnesses nationwide.